package com.atguigu.gulimall.product.service.impl;

import com.atguigu.common.constant.ProductConstant;
import com.atguigu.common.utils.PageUtils;
import com.atguigu.common.utils.Query;
import com.atguigu.gulimall.product.dao.AttrAttrgroupRelationDao;
import com.atguigu.gulimall.product.dao.AttrGroupDao;
import com.atguigu.gulimall.product.dao.CategoryDao;
import com.atguigu.gulimall.product.entity.AttrAttrgroupRelationEntity;
import com.atguigu.gulimall.product.entity.AttrGroupEntity;
import com.atguigu.gulimall.product.entity.CategoryEntity;
import com.atguigu.gulimall.product.service.AttrAttrgroupRelationService;
import com.atguigu.gulimall.product.service.CategoryService;
import com.atguigu.gulimall.product.vo.AttrGroupRelationVo;
import com.atguigu.gulimall.product.vo.AttrRespVo;
import com.atguigu.gulimall.product.vo.AttrVo;
import com.baomidou.mybatisplus.core.conditions.update.UpdateWrapper;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Service;

import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.atguigu.gulimall.product.dao.AttrDao;
import com.atguigu.gulimall.product.entity.AttrEntity;
import com.atguigu.gulimall.product.service.AttrService;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.StringUtils;

import javax.annotation.Resource;


@Service("attrService")
public class AttrServiceImpl extends ServiceImpl<AttrDao, AttrEntity> implements AttrService {

    @Resource
    private AttrAttrgroupRelationDao relationDao;

    @Resource
    private CategoryDao categoryDao;

    @Resource
    private AttrGroupDao attrGroupDao;

    @Resource
    private CategoryService categoryService;

    @Resource
    private AttrAttrgroupRelationService relationService;

    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<AttrEntity> page = this.page(
                new Query<AttrEntity>().getPage(params),
                new QueryWrapper<AttrEntity>()
        );

        return new PageUtils(page);
    }

    @Override
    @Transactional
    public void saveAttr(AttrVo attrVo) {
        AttrEntity attrEntity = new AttrEntity();
        BeanUtils.copyProperties(attrVo,attrEntity);
        //保存基本数据
        this.save(attrEntity);
        //保存关联关系
        if (attrVo.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode() && attrVo.getAttrGroupId()!=null){
            AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
            relationEntity.setAttrGroupId(attrVo.getAttrGroupId());
            relationEntity.setAttrId(attrEntity.getAttrId());
            relationDao.insert(relationEntity);
        }
    }

    @Override
    public PageUtils queryBaseAttrPage(Map<String, Object> params, Long catelogId, String type) {
        QueryWrapper<AttrEntity> queryWrapper = new QueryWrapper<AttrEntity>()
                .eq("attr_type","base".equalsIgnoreCase(type)?ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode():ProductConstant.AttrEnum.ATTR_TYPE_SALE.getCode());

        if (catelogId!=0){
                queryWrapper.eq("catelog_id",catelogId);
        }

        String key = (String) params.get("key");

        if (!StringUtils.isEmpty(key)){
            queryWrapper.and((wrapper)->{
               wrapper.eq("attr_id",key).or().like("attr_name",key);
            });
        }

        IPage<AttrEntity> page = this.page(
                new Query<AttrEntity>().getPage(params),
                queryWrapper
        );

        PageUtils pageUtils = new PageUtils(page);
        List<AttrEntity> records = page.getRecords();
        List<AttrRespVo> attrRespVos = records.stream().map((attrEntity)->{
            AttrRespVo attrRespVo = new AttrRespVo();
            BeanUtils.copyProperties(attrEntity,attrRespVo);
            //设置分类和分组名字
            if ("base".equalsIgnoreCase(type)){
                AttrAttrgroupRelationEntity relationEntity = relationDao.selectOne(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id",attrEntity.getAttrId()));
                if (relationEntity!=null && relationEntity.getAttrGroupId()!=null){
                    AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(relationEntity.getAttrGroupId());
                    attrRespVo.setGroupName(attrGroupEntity.getAttrGroupName());
                }
            }
            CategoryEntity categoryEntity = categoryDao.selectById(attrEntity.getCatelogId());
            if (categoryEntity!=null){
                attrRespVo.setCatelogName(categoryEntity.getName());
            }
            return attrRespVo;
        }).collect(Collectors.toList());

        pageUtils.setList(attrRespVos);
        return pageUtils;
    }

    @Override
    public AttrRespVo getAttrInfo(Long attrId) {
        AttrRespVo attrRespVo = new AttrRespVo();
        AttrEntity attrEntity = this.getById(attrId);
        BeanUtils.copyProperties(attrEntity,attrRespVo);

        if (attrEntity.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode()){
            //设置分组信息
            AttrAttrgroupRelationEntity relationEntity = relationDao.selectOne(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id",attrId));
            if (relationEntity != null) {
                attrRespVo.setAttrGroupId(relationEntity.getAttrGroupId());
                AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(relationEntity.getAttrGroupId());
                if (attrGroupEntity!=null){
                    attrRespVo.setGroupName(attrGroupEntity.getAttrGroupName());
                }
            }
        }

        //设置分类信息
        Long catelogId = attrEntity.getCatelogId();
        Long[] catelogPath = categoryService.findCatelogPath(catelogId);
        attrRespVo.setCatelogPath(catelogPath);
        CategoryEntity categoryEntity = categoryDao.selectById(catelogId);
        if (categoryEntity!=null){
            attrRespVo.setCatelogName(categoryEntity.getName());
        }
        return attrRespVo;
    }

    @Transactional
    @Override
    public void updateAttr(AttrVo attrVo) {
        AttrEntity attrEntity = new AttrEntity();
        BeanUtils.copyProperties(attrVo,attrEntity);
        this.updateById(attrEntity);

        if (attrEntity.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode()){
            //修改分组关联
            AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
            relationEntity.setAttrId(attrVo.getAttrId());
            relationEntity.setAttrGroupId(attrVo.getAttrGroupId());

            Integer count = relationDao.selectCount(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id",attrVo.getAttrId()));
            //大于0进行修改
            if (count>0){
                relationDao.update(relationEntity, new UpdateWrapper<AttrAttrgroupRelationEntity>().eq("attr_id",attrVo.getAttrId()));
            }else{
                relationDao.insert(relationEntity);
            }
        }
    }

    @Override
    public void removeAttr(Long[] attrIds) {
        this.removeByIds(Arrays.asList(attrIds));
        for (Long attrId:attrIds){
            relationService.remove(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id",attrId));
        }
    }

    /**
     * 根据分组id查找关联的所有基本属性
     * @return
     * @param attrgroupId
     */
    @Override
    public List<AttrEntity> getRelationAttr(Long attrgroupId) {
        List<AttrAttrgroupRelationEntity> entities = relationDao.selectList(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_group_id",attrgroupId));
        if (entities.size()>0) {
            List<Long> attrIds = entities.stream().map((attr)->{
                return attr.getAttrId();
            }).collect(Collectors.toList());

            List<AttrEntity> attrEntity =  this.listByIds(attrIds);
            return attrEntity;
        }
        return null;
    }

    //删除关联关系
    @Override
    public void deleteRelation(AttrGroupRelationVo[] vos) {
        List<AttrAttrgroupRelationEntity> entities = Arrays.asList(vos).stream().map((item)->{
            AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
            BeanUtils.copyProperties(item,relationEntity);
           return relationEntity;
        }).collect(Collectors.toList());
        relationDao.deleteBatchRelation(entities);
    }

    /**
     * 获取当前分组没有关联的所有属性
     * @param attrgroupId
     * @param params
     * @return
     */
    @Override
    public PageUtils getNoRelationAttr(Long attrgroupId, Map<String, Object> params) {
        //1、当前分组只能关联自己所属分类的所有属性
        AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrgroupId);
        Long catelogId = attrGroupEntity.getCatelogId();

        //2、当前分组只能关联别的分组没有引用的属性
        //2.1)当前分类下的其他分组
        List<AttrGroupEntity> groupEntities = attrGroupDao.selectList(new QueryWrapper<AttrGroupEntity>().eq("catelog_id",catelogId));
        List<Long> collect = groupEntities.stream().map(item->{
           return item.getAttrGroupId();
        }).collect(Collectors.toList());

        //2.2）这些分组关联的属性
        List<AttrAttrgroupRelationEntity> relationEntities = relationDao.selectList(new QueryWrapper<AttrAttrgroupRelationEntity>().in("attr_group_id",collect));
        List<Long> attrIds = relationEntities.stream().map(item->{
           return item.getAttrId();
        }).collect(Collectors.toList());

        //2.3）从当前分类的所有属性中移除这些属性
        QueryWrapper<AttrEntity> wrapper = new QueryWrapper<AttrEntity>().eq("catelog_id",catelogId).eq("attr_type",ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode());
        if (attrIds!=null && attrIds.size()>0){
            wrapper.notIn("attr_id",attrIds);
        }
        String key = (String) params.get("key");
        if (!StringUtils.isEmpty(key)){
            wrapper.and(w->{
               w.eq("attr_id",key).or().like("attr_name",key);
            });
        }
        IPage<AttrEntity> page = this.page(new Query<AttrEntity>().getPage(params),wrapper);
        PageUtils pageUtils = new PageUtils(page);

        return pageUtils;
    }

    /**
     * 在指定集合挑选可检索属性
     * @param attrIds
     * @return
     */
    @Override
    public List<Long> selectSearchAttrIds(List<Long> attrIds) {

        return baseMapper.selectSearchAttrIds(attrIds);
    }

}